This Hi-Tech Duravent S-TL series coated fiberglass duct hose is suitable for bridging misalignments between system components and ducts, and for transferring hot or cool air in HVAC applications. The hose is made of coated woven fiberglass for light weight and flexibility, and is permanently bonded to a coated wire helix reinforcement for strength and resistance to corrosion and crushing. It has an operating temperature range of 0 to 250 degrees F. It is Underwriters Laboratories (UL) Listed, meets National Fire Prevention Association (NFPA) standards 90A and 90B, and can be used with a variety of coupling options (not included). This coated fiberglass duct hose is suitable for industrial, commercial, and residential heating, ventilation, and air conditioning applications.Industrial hoses transfer or convey air or liquid in hose systems. When selecting industrial hoses, use the STAMPED method: S = Size (ID, OD, and length) T = Temperature (maximum and minimum temperatures of material being transported) A = Application (industry or process) M = Material (to be conveyed, type and concentration) P = Pressure (maximum working pressure) E = Ends (type of end connectors or couplings on hose) D = Delivery method (volume and velocity)The inside diameter of the hose must be adequate to keep pressure loss to a minimum and avoid damage to the hose due to heat generation or excessive turbulence. The hose must be capable of withstanding the minimum and maximum temperatures that occur within the hose system. Some applications require specialized oils or chemicals to be conveyed through the system. In this case, hose selection must ensure compatibility of the hose tube, cover, couplings and O-rings with the fluid used. Industrial hoses are used in systems such as air compressors, automatic manufacturing operations, aircraft controls, and tire installation in industries including agriculture, mining, road construction, firefighting, and aviation.Hi-Tech Duravent manufactures flexible hose and ducting for air, fume, and dust collection applications. The company, founded in 1947 as Flexible Technologies, is headquartered in Abbeville, SC.